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January, 01/26/2015
Events and times subject to change

January 26, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag
Michael Blanton
NYU

What Can We Learn From Galaxy Spectra?



January 27, 2015 Tuesday 3:30 PM  +
Meyer 6th Floor Conference Room
Hard Condensed Matter Seminars (hcmp)


Martin Weitz
University of Bonn

Bose-Einstein Condensation of Photons and Periodic Potentials for Light

Bose-Einstein condensation has been observed in several physical systems, including cold atomic gases, exciton-polaritons, and magnons. Photons usually show no Bose-Einstein condensation, since for Planck’s blackbody radiation the particle number is not conserved and the photons at low temperatures vanish in the system walls. I here describe experiments with a dye-filled optical microresonator experimentally observing Bose-Einstein condensation of photons. Thermalization is achieved in a number conserving way by photon scattering off the dye molecules, and the cavity mirrors provide both an effective photon mass and a confining potential. I will also report on recent work realizing periodic lattice potentials for the photon gas.


January 28, 2015 Wednesday 2:00 PM  +
Meyer 6th Floor Conference Room
Soft Condensed Matter Seminars (csmr)


Damon Clark

How Flies Compute Motion: Tuning Nonlinearities to Natural Scenes

Fruit flies provide an excellent toolkit for understanding how neurons perform computations. In particular, the fruit fly’s visual system is a model system for circuits that extract motion information from visual scenes. Direction-selective neural responses to visual motion require nonlinear processing. In the fruit fly, the Hassenstein-Reichardt Correlator (HRC) model uses a multiplication operation to generate its nonlinear step, and it successfully predicts a host of neural and behavioral visual motion responses in insects. Our recent experiments also show visual motion responses that are not predicted by a pure multiplicative nonlinearity. In order to understand how the form of the nonlinear step influences motion perception, we have investigated the performance of alternative model nonlinearities in estimating motion in natural scenes. Our results show that the addition of higher-order nonlinearities can significantly improve motion estimates in natural scenes compared to the standard HRC. Models optimized to work well in natural scenes respond to artificial correlations in patterns similar to those measured in flies, whose responses are thus consistent with a nonlinear step that is optimized to estimate motion in natural conditions.


January 28, 2015 Wednesday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
High Energy Physics Seminars (hep)


Matthew Dolan
SLAC

A Taste of Dark Matter: Flavour Constraints on Light Pseudoscalar Mediators



January 29, 2015 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


Alessandra Lanzara
UC Berkeley

Switching Quantum Materials Properties with Light

The recent advancements in laser technology have dramatically expanded the applications of lasers to table top experiments in condensed matter physics. Femtosecond time-resolved spectroscopy techniques are emerging tools in the study of quantum materials, offering new paths to disentangle coexisting phases with similar energy scale, selectively tune a specific phase across a quantum critical point and create hidden states that do not exist in equilibrium, to name a few.
In this talk I will present some of our recent work where ultrafast light is used to manipulate electron charges, spin and lattice to reveal underlying properties in quantum materials, to drive metal insulator transition, to destroy superconductivity and to control spin texture in topological insulators. Future direction in the field will be discussed.


February 2, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag



February 4, 2015 Wednesday 2:00 PM  +
Meyer 6th Floor Conference Room
Soft Condensed Matter Seminars (csmr)


Yitzhak Rabin
Bar Ilan University

TBD



February 4, 2015 Wednesday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
High Energy Physics Seminars (hep)


Frederik Denef
Columbia University

TBA



February 5, 2015 Thursday 11:00 AM  +
Meyer 721
Hard Condensed Matter Seminars (hcmp)


Mark Hoefer
University of Colorado, Boulder

Particle and Wave Dynamics of Magnetic Droplet Solitons

Droplet solitons are a strongly nonlinear, inherently dynamic wave structure in the magnetization of ferromagnets balancing dispersion (exchange energy) with focusing nonlinearity (strong perpendicular anisotropy). Their recent observation by multiple groups using nanocontact-spin torque oscillators (NC-STOs) motivates a detailed analysis of droplet dynamics in realistic physical environments. One useful approach is to treat the droplet as a moving, precessing, dipolar particle. Soliton perturbation theory is used to describe the action of a number of important physical effects on droplets, e.g., damping, forcing via spin torque, and inhomogeneous magnetic fields. The wave nature of droplets becomes important, for example, when they interact with each other or with a ferromagnetic boundary. Exhaustive micromagnetic simulations are used to classify droplet scattering. These coherent structures provide a new tool by which magnetic materials could be interrogated or used as information carriers.


February 5, 2015 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


John Johnson

TBA



February 6, 2015 Friday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
Astrophysics and Relativity Seminars (astro)


Jonathan Katz
Washington University

Fast Radio Bursts

Fast Radio Bursts were discovered by Thornton, et al. (2013), and possibly earlier by Lorimer, et al. (2007), in the Parkes Multibeam Pulsar Survey at high Galactic latitude. They show classic pulsar-like pulse dispersion that, if attributed to intergalactic plasma, indicates cosmological distances and extremely high (~10^{37}K) brightness temperatures that can only be explained as the result of coherent emission. The degree of charge clumping required implies relativistic potentials. The de-dispersed pulses of two FRB are broadened to several ms with a frequency dependence that indicates scattering along the paths between source and observer. The scattering cannot be attributed to the general intergalactic medium and appears to have taken place close to the sources. I will discuss implications for the origins and distances of FRB and their astronomical environments, and consider the possibility that FRB are local interference rather than an astronomical phenomenon.


February 9, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag



February 11, 2015 Wednesday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
High Energy Physics Seminars (hep)


Albion Lawrence
Brandeis

TBA



February 11, 2015 Wednesday 2:00 PM  +
Meyer 6th Floor Conference Room
Soft Condensed Matter Seminars (csmr)


Andrew Leifer
Princeton University

Whole-brain Functional Imaging in Freely Behaving Nematodes

How does a nervous system control an animal’s behavior? We are investigating this question by manipulating and monitoring neural activity of populations of neurons in the brain of a simple transparent organism and correlating the observed neural dynamics with behavior. I will present a suite of optical tools to control and record activity in the nematode C. elegans as it moves, including the first instrument to perform whole-brain calcium imaging with cellular resolution in an awake and unrestrained behaving animal. We have used these techniques to gain insight into the underlying neural mechanisms behind mechanosensation, forward locomotion, and the C. elegans escape response. These measurements are a critical first step for investigating neural coding of behavior, decision-making and the time evolution of internal brain states.


February 12, 2015 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


Vincenzo Vitelli
Leiden

TBA



February 13, 2015 Friday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
Astrophysics and Relativity Seminars (astro)


Kendrick Smith
Perimeter Institute



February 16, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag



February 18, 2015 Wednesday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
High Energy Physics Seminars (hep)


Andy Royston
Texas A&M

TBA



February 18, 2015 Wednesday 2:00 PM  +
Meyer 6th Floor Conference Room
Soft Condensed Matter Seminars (csmr)


Shy Shoham
Technion University

TBA



February 20, 2015 Friday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
Astrophysics and Relativity Seminars (astro)


Adam Leroy
NRAO / Ohio State University



February 23, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag



February 25, 2015 Wednesday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
High Energy Physics Seminars (hep)


Alexander Zhiboedov
Harvard

TBA



February 26, 2015 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


Vicky Kaspi
McGill University

TBA



February 27, 2015 Friday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
Astrophysics and Relativity Seminars (astro)


Beth Willman
Haverford College



March 2, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag



March 4, 2015 Wednesday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
High Energy Physics Seminars (hep)


Adam Peterson
University of Minnesota

TBA



March 5, 2015 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


John Condeelis
Albert Einstein Cancer Center

TBA



March 6, 2015 Friday 11:00 AM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

Informal Astro Talk
Nanda Rea
Univ. of Amsterdam

Magnetars



March 6, 2015 Friday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
Astrophysics and Relativity Seminars (astro)


Matthew Turk
NCSA



March 9, 2015 Monday 11:00 AM  +
Meyer 5th Fl. CCPP Lounge
Experimental Particle Physics Seminars (hep-ex)


Daniel Whiteson
UC Irvine

The CrayFis Smartphone Cosmic-Ray Project



March 9, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag



March 11, 2015 Wednesday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
High Energy Physics Seminars (hep)


Adam Martin
Notre Dame

TBA



March 12, 2015 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


Joe Lykken

TBA



March 13, 2015 Friday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
Astrophysics and Relativity Seminars (astro)


Tea Temim
University of Maryland College Park

Supernovae as Drivers of Dust Evolution in Galaxies

The understanding of interstellar dust is important in many areas of astrophysics, but its nature, origin, and evolution are still poorly understood. The presence of dust in galaxies has a profound effect on their spectral appearance and on the many processes that determine the physical, chemical, and thermal state of the interstellar medium (ISM). Dust is primarily formed in the ejecta of core collapse supernovae (SNe) and mass outflows of evolved stars, and then subsequently destroyed by SN shocks expanding into the surrounding ISM. I will present the recent progress on the study of SN-formed dust in supernova remnants (SNRs), including recent observations of Cas A, SN 1987A, and the Crab Nebula that revealed significant masses of cold dust, as well as new estimates of global dust destruction rates by SNRs in the Magellanic Clouds. I will discuss the balance between dust formation and destruction by SNe and its implications for dust evolution models and our understanding of the origin of interstellar dust in galaxies.


March 16, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag



March 23, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag



March 25, 2015 Wednesday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
High Energy Physics Seminars (hep)


Spencer Chang
University of Oregon

tba



March 26, 2015 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


Jerome Bibette
EPSCI

TBA



March 27, 2015 Friday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
Astrophysics and Relativity Seminars (astro)


Neil Gehrels
Goddard Space Flight Center

Adventures in Time Domain Astronomy

The X-ray and gamma-ray sky is more dynamic than in other wavelength bands. Gamma-ray bursts, supernovae, and black hole accretors all are characterized by bursts and flares. We are in a rich period of time domain astronomy with Swift, and Fermi operating. The X-ray through high energy gamma-ray skies are being monitored on hourly to daily time scales at sensitivities more than an order of magnitude better than ever before. Highlights will be presented of the exciting and often surprising results about our highly variable universe.


March 30, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag



April 1, 2015 Wednesday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
High Energy Physics Seminars (hep)


Kfir Blum
IAS

TBA



April 3, 2015 Friday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
High Energy Physics Seminars (hep)


Adam Peterson
University of Minnesota

TBA



April 3, 2015 Friday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
Astrophysics and Relativity Seminars (astro)


Alan Calder
Stony Brook



April 6, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag



April 8, 2015 Wednesday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
High Energy Physics Seminars (hep)


Ami Katz
Boston University

TBA



April 9, 2015 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


Mikhail Lukin
Harvard University

TBA



April 10, 2015 Friday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
Astrophysics and Relativity Seminars (astro)


Nikhil Padmanabhan
Yale University



April 13, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag



April 15, 2015 Wednesday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
High Energy Physics Seminars (hep)


James Stokes
UPenn

The curious case of large-N expansions on a (pseudo)sphere



April 15, 2015 Wednesday 2:00 PM  +
Meyer 6th Floor Conference Room
Soft Condensed Matter Seminars (csmr)


Edward Lyman
University of Delaware

TBA



April 16, 2015 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


Gabriel Kotliar

TBA



April 17, 2015 Friday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
Astrophysics and Relativity Seminars (astro)


Phil Marshall
Stanford



April 20, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag



April 22, 2015 Wednesday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
High Energy Physics Seminars (hep)


Tony Gherghetta
University of Minnesota

TBA



April 24, 2015 Friday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
Astrophysics and Relativity Seminars (astro)


Daan Meerburg
CITA



April 27, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag



April 29, 2015 Wednesday 10:00 AM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

PhD defense
Daniel Foreman-Mackey
NYU

Exoplanets TBA



April 29, 2015 Wednesday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
High Energy Physics Seminars (hep)


Sean Carroll
Caltech

tba



April 30, 2015 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


Marc Kamionkowksi

TBA



May 1, 2015 Friday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
Astrophysics and Relativity Seminars (astro)


Sarbani Basu
Yale University



May 4, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag



May 6, 2015 Wednesday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
High Energy Physics Seminars (hep)


Daniel Harlow
Princeton

TBA



May 7, 2015 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


Ivan Schuller

TBA



May 8, 2015 Friday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
Astrophysics and Relativity Seminars (astro)


Erik Tollerud
Yale University



May 11, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag



May 13, 2015 Wednesday 2:00 PM  +
Meyer 5th Fl. CCPP Lounge
High Energy Physics Seminars (hep)


Kristan Jensen
Stony Brook

TBA



May 18, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag



May 25, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag



June 1, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag



June 8, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag



June 15, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag



June 22, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag



June 29, 2015 Monday 12:30 PM  +
Meyer 5th Fl. CCPP Lounge
Other CCPP (ccpp)

CCPP Brown Bag